Coulomb is a simple and elegant circuit simulator.
Features:
- Draw arbitrary circuits
- Plot voltage and current of devices against time
- Save/Load circuits
- Dark Mode support
- Beautiful UI
Available Devices:
- Resistor
- Battery
- Current Source
- AC Voltage Source
- Inductor
- Capacitor
- Diode
- Zener Diode
Problems:
- Circuits containing non-linear devices will most probably not be solvable, because the current backend is not good at dealing with non-linear systems, that's going to change though.
- Due to the way inductors and capacitors are modeled you can't put two inductors in series, or two capacitors in parallel, that's also going to be fixed.
Screenshots
Observed history
| App | Change | Version | When ↑ |
|---|
No observed changes yet.
The initial import establishes a baseline. Future version changes will appear here.
Browse the app catalogue →Upstream releases
Release notes supplied by the developer. These dates are not Flathub package publication times.
0.6.16 Feb 2025
Updated icon. Fixed the app crashing when switching color scheme after opening about window.
0.6.02 Dec 2024
Made necessary changes for flatpak support, making use of portals, and adding a proper app ID.




